regarding dig outputs

[Vishwas]

Hi all,
Am pasting below 3 outputs from 3 dig queries.
Query 1: dig www.google.com
Output 1: See the Authority section and Additional section, I was
expecting entries of google DNS servers in these two sections but
instead am getting ROOT servers. Then I removed the forwarder entry
from my DNS and I started getting what I was expecting (See output of
Query 3, below). What does this mean? Does it mean that the forwarder
that I was using does not perform recursion for me?

Query 2: dig www.google.com
Output 2: The Authority section and Additional section did not return
anything. But on repeating the query, I started getting entries in
these sections. It happens for any site that I query for the first
time. What can be the reason?



----- Query 1 ----------------------------------------------------------------------

dns at debian:~$ dig www.google.com

; <<>> DiG 9.3.4 <<>> www.google.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6791
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 13, ADDITIONAL: 13

;; QUESTION SECTION:
;www.google.com.                        IN      A

;; ANSWER SECTION:
www.google.com.         552253  IN      CNAME   www.l.google.com.
www.l.google.com.       283     IN      A       64.233.189.104

;; AUTHORITY SECTION:
.                       362829  IN      NS      H.ROOT-SERVERS.NET.
.                       362829  IN      NS      I.ROOT-SERVERS.NET.
.                       362829  IN      NS      J.ROOT-SERVERS.NET.
.                       362829  IN      NS      K.ROOT-SERVERS.NET.
.                       362829  IN      NS      L.ROOT-SERVERS.NET.
.                       362829  IN      NS      M.ROOT-SERVERS.NET.
.                       362829  IN      NS      A.ROOT-SERVERS.NET.
.                       362829  IN      NS      B.ROOT-SERVERS.NET.
.                       362829  IN      NS      C.ROOT-SERVERS.NET.
.                       362829  IN      NS      D.ROOT-SERVERS.NET.
.                       362829  IN      NS      E.ROOT-SERVERS.NET.
.                       362829  IN      NS      F.ROOT-SERVERS.NET.
.                       362829  IN      NS      G.ROOT-SERVERS.NET.

;; ADDITIONAL SECTION:
A.ROOT-SERVERS.NET.     523479  IN      A       198.41.0.4
B.ROOT-SERVERS.NET.     484289  IN      A       192.228.79.201
C.ROOT-SERVERS.NET.     88759   IN      A       192.33.4.12
D.ROOT-SERVERS.NET.     495704  IN      A       128.8.10.90
E.ROOT-SERVERS.NET.     88759   IN      A       192.203.230.10
F.ROOT-SERVERS.NET.     523479  IN      A       192.5.5.241
G.ROOT-SERVERS.NET.     521969  IN      A       192.112.36.4
H.ROOT-SERVERS.NET.     521968  IN      A       128.63.2.53
I.ROOT-SERVERS.NET.     521969  IN      A       192.36.148.17
J.ROOT-SERVERS.NET.     523479  IN      A       192.58.128.30
K.ROOT-SERVERS.NET.     523479  IN      A       193.0.14.129
L.ROOT-SERVERS.NET.     521968  IN      A       198.32.64.12
M.ROOT-SERVERS.NET.     521968  IN      A       202.12.27.33

;; Query time: 75 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Sun Jun 17 18:17:39 2007
;; MSG SIZE  rcvd: 487


---- Query 2 -----------------------------------------------------------------------


debian:~# dig www.google.com

; <<>> DiG 9.3.4 <<>> www.google.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 30018
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.google.com.                        IN      A

;; ANSWER SECTION:
www.google.com.         604131  IN      CNAME   www.l.google.com.
www.l.google.com.       86      IN      A       64.233.189.104

;; Query time: 31 msec
;; SERVER: 165.21.83.88#53(165.21.83.88)
;; WHEN: Sun Jun 17 18:20:56 2007
;; MSG SIZE  rcvd: 68

debian:~#


---- Query 3 -----------------------------------------------------------------------

debian:~# dig www.google.com

; <<>> DiG 9.3.4 <<>> www.google.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 3489
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 7, ADDITIONAL: 0

;; QUESTION SECTION:
;www.google.com.                        IN      A

;; ANSWER SECTION:
www.google.com.         604700  IN      CNAME   www.l.google.com.
www.l.google.com.       200     IN      A       66.249.89.103
www.l.google.com.       200     IN      A       66.249.89.104
www.l.google.com.       200     IN      A       66.249.89.99

;; AUTHORITY SECTION:
l.google.com.           86300   IN      NS      b.l.google.com.
l.google.com.           86300   IN      NS      c.l.google.com.
l.google.com.           86300   IN      NS      d.l.google.com.
l.google.com.           86300   IN      NS      e.l.google.com.
l.google.com.           86300   IN      NS      f.l.google.com.
l.google.com.           86300   IN      NS      g.l.google.com.
l.google.com.           86300   IN      NS      a.l.google.com.

;; Query time: 25 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Sun Jun 17 18:22:36 2007
;; MSG SIZE  rcvd: 212

----------- End of output -----



-- 
Best Regards,
Vishwas.
ivishwas.googlepages.com

I know quite certainly that I myself have no special talent;
curiosity, obsession and dogged endurance, combined with
self-criticism have brought me to my ideas. - Albert Einstein